Photos app did not open my iPhoto library
I searched the forums but didn't find an answer...
I recently upgraded to 10.10.3, looking forward to trying out the Photos app. My understanding is that on the first launch, Photos should open up the existing iPhoto library. However, I had my iPhoto library outside of the Home>Pictures folder. Additionally, while Yosemite was updating, one of my kids plugged in their iOS device, causing iPhoto to open when I previously had it closed. In any case, when Photos opened, I didn't get a dialogue to use my existing iPhoto library, and there was just a blank library. I went to Preferences, and there is an area that shows "Library location", but there is not a button for me to select the iPhoto library. The button just says, "Show in Finder", which brings me to the Finder.
Aside from manually dragging and importing several thousand photos over from iPhoto to Photos, is there a way for me to have Photos use the existing iPhoto library? Thanks for any help on this!
Mac Pro, Mac OS X (10.6.4)